The speed of the river is 3.2 km / h, the boat’s own speed is 18.7 km / h. What way did the boat

The speed of the river is 3.2 km / h, the boat’s own speed is 18.7 km / h. What way did the boat go if it went downstream for 5 hours, and against the current for 6 hours?

Before you can determine the total distance that the boat has traveled, you need to find its speed in each direction.

When moving along the course of the river, its speed will be equal to the sum of its own speed and the speed of the current, and when moving in the opposite direction, the difference in speeds.

We get:

18.7 + 3.2 = 21.9 km / h (downstream speed),

18.7 – 3.2 = 15.5 km / h (speed upstream).

Find the total distance.

We multiply the speed by time.

5 * 21.9 + 6 * 15.5 = 109.5 + 93 = 202.5 km.

Answer: 202.5 km.